Direct-cooling and direct-heating heat pump structure and extended-range vehicle

Abstract

The invention provides a direct-cooling and direct-heating heat pump structure and an extended-range vehicle, and relates to the technical field of heat management equipment. The direct-cooling and direct-heating heat pump structure comprises a refrigerant circulation assembly and an engine cooling circulation assembly. The refrigerant circulation assembly comprises a compressor, an air conditioner assembly, a multi-way reversing valve, a first cooler, a second cooler and an external condenser, and a plurality of ports of the multi-way reversing valve are connected to the compressor, the air conditioner assembly, the first cooler, the second cooler and the external condenser correspondingly. Wherein the second cooler is connected with the power battery heat exchange cavity in series; the engine cooling circulation assembly comprises an engine cooling cavity, the engine cooling cavity is connected with a cooling liquid channel of the first cooler, and heat exchange is conducted between the engine cooling cavity and a refrigerant channel of the first cooler. The direct-cooling and direct-heating heat pump structure can achieve the technical effects of reducing the cost and improving the heat exchange efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of thermal management equipment, and in particular to a direct cooling and direct heating heat pump structure and an extended-range vehicle. Background Art

[0002] An extended-range vehicle, also known as an extended-range electric vehicle, is a plug-in series hybrid vehicle that is purely electric-driven. Its power system consists of a power battery system, a power drive system, a range extender, and a vehicle control system.

[0003] At present, the existing extended-range vehicle thermal management architecture generally adopts a discrete layout. Generally speaking, it only has a cooling mode, and rarely adopts a heat pump mode. With the advancement of technology, the thermal management architecture of extended-range vehicles now tends to adopt a heat pump architecture to improve and increase the heating efficiency of batteries and passenger compartments in low-temperature environments, thereby increasing the cruising range in pure electric mode in urban conditions and improving economy. However, due to the complex circulation on the cooling side of the existing extended-range vehicle thermal management architecture, it must be equipped with a large number of electronic water pumps, water valves, cooling water pipes, expansion kettles and other corresponding components to achieve the corresponding thermal management function, which has the disadvantages of high cost and low efficiency. Summary of the invention

[0004] The purpose of the present application is to provide a direct cooling and direct heating heat pump structure and an extended-range vehicle, which can achieve the technical effects of reducing costs and improving heat exchange efficiency.

[0005] In a first aspect, the present application provides a direct cooling and direct heating heat pump structure, including a refrigerant circulation component and an engine cooling circulation component;

[0006] The refrigerant cycle assembly includes a compressor, an air conditioning assembly, a multi-way reversing valve, a first cooler, a second cooler, and an external condenser, wherein a plurality of ports of the multi-way reversing valve are respectively connected to the compressor, the air conditioning assembly, the first cooler, the second cooler, and the external condenser, wherein the second cooler is connected in series with the power battery heat exchange cavity;

[0007] The engine cooling cycle assembly includes an engine cooling cavity, the engine cooling cavity is connected to the coolant channel of the first cooler, and the engine cooling cavity performs heat exchange with the refrigerant channel of the first cooler.

[0008] In the above implementation process, the direct cooling and direct heating heat pump structure is connected in series with the power battery heat exchange cavity through the second cooler, and the refrigerant in the second cooler is directly heat exchanged with the battery heat exchange cavity, eliminating the process of coolant circulation participating in the heat exchange; thus, there is no coolant circulation participating in the heat exchange between the battery heat exchange cavity and the air conditioning assembly, and the heat is exchanged by the refrigerant in the refrigerant circulation component, which reduces the use of electronic water pumps, water valves, cooling water pipes and expansion kettles and other devices, thereby improving the heat exchange efficiency and reducing the device cost; at the same time, through the engine cooling cavity and the coolant channel of the first cooler are connected, the coolant can be heat exchanged with the engine in the engine cooling cavity, and the coolant and the refrigerant are heat exchanged in the first cooler; thus, through the above method, the high-temperature coolant of the engine when heating is required is heat exchanged with the first cooler, and the heat can be used to increase the energy of the refrigerant in the refrigerant circulation component for heating the battery and the passenger compartment, thereby reducing the energy consumption in the range extender mode and increasing the total mileage of the vehicle; thus, the direct cooling and direct heating heat pump structure can achieve the technical effect of reducing costs and improving heat exchange efficiency.

[0009] Furthermore, the engine cooling circulation component also includes an on-off valve, a first water pump, and a first radiator, wherein the engine cooling cavity, the on-off valve, the coolant channel of the first cooler, and the first water pump are cyclically connected, and the engine cooling cavity, the first radiator, and the first water pump are cyclically connected.

[0010] In the above implementation process, the engine cooling cavity, the on-off valve, the coolant channel of the first cooler, and the first water pump are circulated and connected, so that when heating is required, the high-temperature coolant in the engine cooling cavity can be heat exchanged with the refrigerant of the first cooler. The heat is used to increase the energy of the refrigerant circulation component and can be used to heat the battery heat exchange cavity, thereby reducing energy consumption and improving energy utilization efficiency.

[0011] Furthermore, the engine cooling cycle assembly also includes a first expansion water tank, and two ends of the first expansion water tank are respectively connected to the outlet end of the engine cooling cavity and the inlet end of the first water pump.

[0012] In the above implementation process, by setting up the first expansion water tank, the expansion amount of the coolant in the engine cooling cycle component is accommodated, and at the same time, it can play a role in maintaining pressure and replenishing water for the engine cooling cycle component.

[0013] Furthermore, the direct cooling and direct heating heat pump structure also includes an intercooler cooling cycle component, and the intercooler cooling cycle component includes a secondary cooling pipeline, an electric drive radiator and an intercooler, and the secondary cooling pipeline is respectively connected to the electric drive radiator and the intercooler.

[0014] In the above implementation process, the intercooler cooling cycle component adopts secondary cooling to achieve heat dissipation of the electric drive and the intercooler through the secondary cooling pipeline, which can effectively improve the heat dissipation efficiency.

[0015] Furthermore, the secondary cooling circuit includes a second radiator, a third radiator, a proportional three-way valve and a second water pump. The second water pump, the second radiator, the proportional three-way valve and the electric drive cooling element are circularly connected. The third radiator and the intercooler are connected in series between the proportional three-way valve and the inlet end of the second water pump.

[0016] In the above implementation process, after the coolant passes through the second radiator for heat dissipation and cooling, a part of the coolant flows to the electric drive heat sink to dissipate heat for the electric drive, and then flows back to the second radiator through the second water pump to realize the coolant circulation; the other part flows to the third radiator through the proportional three-way valve;

[0017] After the coolant is further cooled by the third radiator, it flows to the intercooler to dissipate heat for the intercooler, and then flows back to the second radiator through the second water pump to achieve coolant circulation; thus, secondary cooling is achieved through the proportional three-way valve and the second and third radiators.

[0018] Furthermore, the secondary cooling pipeline also includes a second expansion water tank, one end of the second expansion water tank is connected to the inlet end of the second water pump, and the other end of the second expansion water tank is connected between the proportional three-way valve and the electric drive heat sink.

[0019] In the above implementation process, by providing a second expansion water tank, the expansion amount of the coolant in the intercooler cooling cycle component is accommodated, and at the same time, it can play a role in maintaining pressure and replenishing water for the intercooler cooling cycle component.

[0020] Furthermore, the refrigerant circulation component also includes an outlet three-way valve, and the outlet end of the compressor is connected to the air conditioning assembly and the multi-way reversing valve respectively through the outlet three-way valve.

[0021] In the above implementation process, by setting an outlet three-way valve, the outlet end of the compressor can be connected to the air-conditioning assembly and the multi-way reversing valve respectively, so that the multi-way reversing valve is bypassed by the compressor to reduce the resistance of the air-conditioning assembly under refrigeration conditions.

[0022] Furthermore, the air-conditioning assembly includes a front air-conditioning assembly and a rear air-conditioning assembly, the front air-conditioning assembly is provided with a built-in condenser and a first built-in evaporator, the rear air-conditioning assembly is provided with an air heater and a second built-in evaporator, the built-in condenser is connected to the outlet end of the compressor through the outlet three-way valve, and the first built-in evaporator and the second built-in evaporator are connected in parallel to the multi-way reversing valve.

[0023] Furthermore, the refrigerant circulation component also includes a gas-liquid separator, and the gas-liquid separator is connected in series between the inlet end of the compressor and the air conditioning assembly.

[0024] In a second aspect, the present application provides an extended-range vehicle, comprising a direct cooling and direct heating heat pump structure as described in any one of the first aspects.

[0025] Other features and advantages disclosed in the present application will be described in the following description, or some features and advantages can be inferred or determined without doubt from the description, or can be learned by implementing the above-mentioned technology disclosed in the present application.

[0026] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A schematic diagram of the structure of a heat pump structure with direct cooling and direct heating in a cooling mode provided by an embodiment of the present application;

[0029] Figure 2 This is a structural schematic diagram of a heat pump structure with direct cooling and direct heating in the heating mode provided in an embodiment of the present application.

[0030] Figure numerals: compressor 11; air-conditioning assembly 12; front air-conditioning assembly 121; rear air-conditioning assembly 122; multi-way reversing valve 13; first cooler 14; second cooler 15; external condenser 16; power battery heat exchange cavity 17; outlet three-way valve 18; three-way valve 181; four-way valve 182; electronic expansion valve 183; stop valve 184; gas-liquid separator 19; engine cooling cavity 21; on-off valve 22; first water pump 23; first radiator 24; first expansion water tank 25; electric drive heat sink 31; intercooler 32; second expansion water tank 33; second radiator 331; third radiator 332; proportional three-way valve 333; second water pump 334. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0032] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0033] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to specific circumstances.

[0034] In addition, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or a point connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] In addition, the terms "first", "second", etc. are mainly used to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components. Unless otherwise specified, "plurality" means two or more.

[0036] Generally, the thermal management architecture of existing extended-range vehicles generally adopts a discrete arrangement, which only has a cooling mode, and rarely adopts a heat pump mode arrangement;

[0037] With the advancement of technology, the current thermal management architecture of extended-range vehicles tends to adopt a heat pump architecture to improve and increase the heating efficiency of the battery and passenger compartment in low-temperature environments, thereby increasing the range in pure electric mode in urban conditions and improving economy. However, the existing thermal management architecture of extended-range vehicles has a relatively complex circulation on the cooling side, and must be equipped with a large number of corresponding components such as electronic water pumps, water valves, cooling water pipes, and expansion kettles to achieve the corresponding thermal management function, which has the disadvantages of high cost and low efficiency.

[0038] In view of the technical problems raised above, the present application implements a direct cooling and direct heating heat pump structure and an extended-range vehicle, which can solve the problem of complex circulation on the cooling side and achieve the technical effects of reducing costs and improving heat exchange efficiency; see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a heat pump structure with direct cooling and direct heating in the cooling mode provided by an embodiment of the present application. Figure 2 A schematic diagram of a heat pump structure with direct cooling and direct heating in a heating mode provided in an embodiment of the present application, wherein the heat pump structure with direct cooling and direct heating includes a refrigerant circulation component and an engine cooling circulation component;

[0039] Exemplarily, the refrigerant cycle assembly includes a compressor 11, an air conditioning assembly 12, a multi-way reversing valve 13, a first cooler 14, a second cooler 15, and an external condenser 16, wherein a plurality of ports of the multi-way reversing valve 13 are respectively connected to the compressor 11, the air conditioning assembly 12, the first cooler 14, the second cooler 15, and the external condenser 16, wherein the second cooler 15 is connected in series with the power battery heat exchange cavity 17;

[0040] Exemplarily, the refrigerant cycle assembly further includes a three-way valve 181 and a four-way valve 182 for connecting various components, wherein the number of the three-way valve 181 and the four-way valve 182 can be determined according to actual needs; Figure 1 and Figure 2 As shown, the compressor 11, the air conditioning assembly 12, the multi-way reversing valve 13, the first cooler 14, the second cooler 15, and the external condenser 16 are connected in a circulation manner through the three-way valve 181 and the four-way valve 182, and the refrigerant circulates in the refrigerant circulation component.

[0041] Exemplarily, the refrigerant circulation assembly further includes an electronic expansion valve 183 and a stop valve 184. The electronic expansion valve 183 is connected to one of the ports (F) of the multi-way reversing valve 13 through a four-way valve 182, and the refrigerant liquid supply of each pipeline in the refrigerant circulation assembly is adjusted by the electronic expansion valve;

[0042] The stop valve 184 is connected in series between the air conditioning assembly 12 and the multi-way reversing valve 13 to control the on-off flow of the refrigerant in the air conditioning assembly 12 .

[0043] In some optional embodiments, the external condenser 16 is disposed in the passenger cabin of the vehicle, and the temperature of the passenger cabin is regulated by the external condenser 16 .

[0044] In some optional embodiments, the multi-way reversing valve 13 can be a nine-way valve, which is connected to other components in the refrigerant cycle assembly through various ports of the nine-way valve, so that the flow direction of the refrigerant is adjusted through the valve connection of the nine-way valve, so that the direct cooling and direct heating heat pump structure can be switched between cooling mode and direct heating mode.

[0045] In some optional embodiments, the second cooler 15 is connected in series with the power battery heat exchange cavity 17, so that direct heat exchange can be performed with the power battery heat exchange cavity 17 through the refrigerant circulation in the second cooler 15, eliminating the process of coolant circulation participating in the heat exchange; thus, there is no coolant circulation participating in the heat exchange between the power battery heat exchange cavity 17 and the air-conditioning assembly, and the air-conditioning system, that is, the refrigerant in the refrigerant circulation component, performs heat exchange, reducing the use of components such as electronic water pumps, water valves, cooling water pipes and expansion kettles, thereby improving the heat exchange efficiency while reducing the cost of components.

[0046] In some optional embodiments, a power battery is disposed in the power battery heat exchange cavity 17 , and the refrigerant flowing through the power battery heat exchange cavity 17 directly exchanges heat with the power battery.

[0047] Exemplarily, the engine cooling cycle assembly includes an engine cooling cavity 21 , which is connected to the coolant passage of the first cooler 14 , and the engine cooling cavity 21 performs heat exchange with the refrigerant passage of the first cooler 14 .

[0048] Exemplarily, the engine of the vehicle can be arranged in the engine cooling cavity 21; the engine cooling cavity 21 is connected to the coolant channel of the first cooler 14, so that the coolant can exchange heat with the engine in the engine cooling cavity 21, and the coolant and the refrigerant exchange heat in the first cooler 14; thus, in the above manner, the high-temperature coolant of the engine when heating is required is exchanged with the first cooler 14, and the heat can be used to increase the energy of the air-conditioning system for heating the battery and the passenger compartment, thereby reducing the energy consumption in the range extender mode and increasing the total mileage of the vehicle.

[0049] In some embodiments, the direct cooling and direct heating heat pump structure is connected in series with the power battery heat exchange cavity 17 through the second cooler 15, and the refrigerant in the second cooler 15 is circulated to directly exchange heat with the power battery heat exchange cavity 17, eliminating the process of coolant circulation participating in the heat exchange; thus, there is no coolant circulation participating in the heat exchange between the power battery heat exchange cavity 17 and the air-conditioning assembly, and the heat is exchanged by the refrigerant in the refrigerant circulation component, reducing the use of electronic water pumps, water valves, cooling water pipes, expansion kettles and other devices, thereby improving the heat exchange efficiency while reducing the device cost; at the same time, through the engine cooling The cavity 21 is connected to the coolant channel of the first cooler 14, and the coolant can exchange heat with the engine in the engine cooling cavity 21, and the coolant and the refrigerant exchange heat in the first cooler 14; thus, through the above method, the high-temperature coolant of the engine when heating is required is exchanged with the first cooler 14, and the heat can be used to increase the energy of the refrigerant in the refrigerant circulation component for heating the battery and the passenger compartment, thereby reducing the energy consumption in the range extender mode and increasing the total mileage of the vehicle; thus, the direct cooling and direct heating heat pump structure can achieve the technical effect of reducing costs and improving heat exchange efficiency.

[0050] Exemplarily, the engine cooling circulation assembly also includes an on-off valve 22, a first water pump 23, and a first radiator 24, wherein the engine cooling cavity 21, the on-off valve 22, the coolant channel of the first cooler 14, and the first water pump 23 are circularly connected, and the engine cooling cavity 21, the first radiator 24, and the first water pump 23 are circularly connected.

[0051] Exemplarily, the engine cooling cavity 21, the on-off valve 22, the coolant channel of the first cooler 14, and the first water pump 23 are connected in a loop, so that when heating is required, the high-temperature coolant in the engine cooling cavity 21 can be heat exchanged with the refrigerant in the first cooler 14, and the heat is used to increase the energy of the refrigerant circulation component, which can be used to heat the power battery heat exchange cavity 17, thereby reducing energy consumption and improving energy utilization efficiency.

[0052] Optionally, the first cooler 14 is provided with a coolant channel and a refrigerant channel, wherein the coolant channel participates in the coolant circulation of the engine cooling cycle component, the refrigerant channel participates in the refrigerant circulation of the refrigerant cycle component, and the coolant and the refrigerant can realize heat exchange in the first cooler 14 .

[0053] Exemplarily, the engine cooling cycle assembly further includes a first expansion water tank 25 , and two ends of the first expansion water tank 25 are respectively connected to the outlet end of the engine cooling cavity 21 and the inlet end of the first water pump 23 .

[0054] Exemplarily, by providing the first expansion water tank 25, the expansion amount of the coolant can be accommodated in the engine cooling cycle component, and at the same time, the first expansion water tank 25 can play the role of maintaining pressure and replenishing water for the engine cooling cycle component.

[0055] Exemplarily, the direct cooling and direct heating heat pump structure also includes an intercooler cooling cycle component, which includes a secondary cooling pipeline, an electric drive heat sink 31 and an intercooler 32, and the secondary cooling pipeline is connected to the electric drive heat sink 31 and the intercooler 32 respectively.

[0056] Exemplarily, through the secondary cooling pipeline, the intercooler cooling cycle component adopts secondary cooling to achieve heat dissipation of the electric drive and the intercooler, which can effectively improve the heat dissipation efficiency.

[0057] In some optional embodiments, the electric drive heat sink 31 includes multiple three-way valves for connection; in addition, the electric drive heat sink 31 also includes a front electric drive (FMOTOR), a rear electric drive (RMOTOR) and multiple controllers (CDU / MDC, etc.), and a throttle valve for flow regulation, which will not be repeated here.

[0058] Exemplarily, the secondary cooling circuit includes a second radiator 331, a third radiator 332, a proportional three-way valve 333 and a second water pump 334. The second water pump 334, the second radiator 331, the proportional three-way valve 333 and the electric drive cooling element 31 are cyclically connected. The third radiator 332 and the intercooler 32 are connected in series between the inlet ends of the proportional three-way valve 333 and the second water pump 334.

[0059] Exemplarily, after the coolant passes through the second radiator 331 for heat dissipation and cooling, a portion of the coolant flows to the electric drive heat sink 31 to dissipate heat for the electric drive, and then flows back to the second radiator 331 through the second water pump 334 to realize the coolant circulation; the other portion flows to the third radiator 332 through the proportional three-way valve 333;

[0060] After the coolant is further cooled by the third radiator 332 , it flows to the intercooler 32 to dissipate heat for the intercooler 32 , and then flows back to the second radiator 331 through the second water pump 334 to realize the coolant circulation; thus, secondary cooling is realized through the proportional three-way valve 333 and the second radiator 331 and the third radiator 332 .

[0061] Exemplarily, the secondary cooling circuit also includes a second expansion water tank 33 , one end of the second expansion water tank 33 is connected to the inlet end of the second water pump 334 , and the other end of the second expansion water tank 33 is connected between the proportional three-way valve 333 and the electric drive heat sink 31 .

[0062] Exemplarily, by providing the second expansion water tank 33, the expansion amount of the coolant in the intercooler cooling cycle assembly can be accommodated, and at the same time, the pressure can be maintained and the water can be replenished for the intercooler cooling cycle assembly.

[0063] Exemplarily, the refrigerant circulation assembly further includes an outlet three-way valve 18 , and the outlet end of the compressor 11 is connected to the air conditioning assembly 12 and the multi-way reversing valve 13 respectively through the outlet three-way valve 18 .

[0064] For example, by setting an outlet three-way valve 18, the outlet end of the compressor 11 can be connected to the air-conditioning assembly 12 and the multi-way reversing valve 13 respectively, so that the multi-way reversing valve 13 is bypassed by the compressor 11 to reduce the resistance of the air-conditioning assembly 12 under refrigeration conditions.

[0065] Exemplarily, the air-conditioning assembly 12 includes a front air-conditioning assembly 121 and a rear air-conditioning assembly 122. The front air-conditioning assembly 121 is provided with a built-in condenser and a first built-in evaporator, and the rear air-conditioning assembly 122 is provided with an air heater and a second built-in evaporator. The built-in condenser is connected to the outlet end of the compressor 11 through an outlet three-way valve 18, and the first built-in evaporator and the second built-in evaporator are connected in parallel to the multi-way reversing valve 13.

[0066] In some optional embodiments, the built-in condenser and the first built-in evaporator are labeled Icond and evaporator respectively in the front air-conditioning assembly 121; the air heater and the second built-in evaporator are labeled Air PTC and evaporator respectively in the rear air-conditioning assembly 122.

[0067] Exemplarily, the refrigerant cycle assembly further includes a gas-liquid separator 19 , which is connected in series between the inlet end of the compressor 11 and the air conditioning assembly 12 .

[0068] Exemplarily, an embodiment of the present application provides an extended-range vehicle, including: Figure 1 and Figure 2 The direct cooling and direct heating heat pump structure shown.

[0069] In some implementation scenarios, combined with Figure 1 to Figure 2 The direct cooling and direct heating heat pump structure shown in the embodiment of the present application adopts a direct cooling and direct heating arrangement compared with the general extended-range vehicle thermal management architecture. The power battery heat exchange cavity 17 and the air conditioning assembly 12 do not have a coolant circulation to participate in the heat exchange, and the refrigerant in the refrigerant circulation component performs heat exchange; since the circulation on the cooling side is cancelled, the use of electronic water pumps, water valves, cooling water pipes, expansion kettles and other components is reduced, which has the characteristics of low cost and high efficiency, and can effectively improve the low-temperature endurance target of the whole vehicle; the specific operation mode examples of the direct cooling and direct heating heat pump structure are as follows:

[0070] 1. Refrigerant side: A pressure sensor can be arranged at the inlet and outlet of the compressor 11. The refrigerant flows out from the outlet after being compressed by the compressor. The flow route is as follows:

[0071] 1) Heating mode (i.e. general heat pump mode):

[0072] Compressor 11 → built-in condenser (Icond) of front air conditioning assembly 121 → multi-way reversing valve 13 (A / B connection) → second cooler 15 → multi-way reversing valve 13 (C / F connection) → four-way valve 182 → electronic expansion valve 183 → three-way valve 181 → multi-way reversing valve 13 (H / G connection) → external condenser 16 (OHX, used as evaporator) → multi-way reversing valve 13 (D / E connection) → three-way valve 181 → three-way valve 181 → gas-liquid separator 19 → compressor 11;

[0073] Compressor 11 → built-in condenser (Icond) of front air conditioning assembly 121 → multi-way reversing valve 13 (A / B connection) → second cooler 15 → multi-way reversing valve 13 (C / F connection) → four-way valve 182 → electronic expansion valve 183 → first cooler 14 → electric heater (PTC) → second cooler 15 → power battery heat exchange cavity 17 → three-way valve 181 → gas-liquid separator 19 compressor 11;

[0074] 2) Refrigeration mode (i.e. general refrigeration mode):

[0075] Compressor 11 → built-in condenser (Icond) of front air conditioning assembly 121 → multi-way reversing valve 13 (A / D connection) → external condenser 16 (OHX) → multi-way reversing valve 13 (G / F connection) → four-way valve 182; after passing through the four-way valve 182, the refrigerant is divided into three paths, as shown below:

[0076] i.→Electronic expansion valve 183→First cooler 14→PTC→Second cooler 15→Power battery heat exchange cavity 17→Three-way valve 181→Gas-liquid separator 19→Compressor 11;

[0077] ii.→electronic expansion valve 183→three-way valve 181→stop valve 184→second built-in evaporator of rear air conditioning assembly 122→three-way valve 181→three-way valve 181→three-way valve 181→gas-liquid separator 19→compressor 11;

[0078] iii.→electronic expansion valve 183→first built-in evaporator of front air conditioning assembly 121→three-way valve 181→three-way valve 181→gas-liquid separator 19→compressor 11;

[0079] 2. Coolant side: Engine cooling cycle, using an on-off valve to control heat exchange with the first cooler, disconnected under cooling conditions, connected under heating conditions for waste heat recovery; Electric drive and CAC intercooler cooling cycle, using two-stage cooling to achieve heat dissipation of the electric drive and CAC intercooler respectively;

[0080] Exemplarily, under the damper control of the air-conditioning assembly 12, the front air-conditioning assembly 121 uses the built-in condenser (Icond) for heating, and the rear air-conditioning assembly 122 uses the air heater (Air PTC) for heating; when heating is required, the two sets of dampers blow upwards to the built-in condenser and the air heater; when cooling is required, the two sets of dampers blow downwards to the first built-in evaporator / the second built-in evaporator.

[0081] For example, in combination Figure 1 and Figure 2 As shown, the direct cooling and direct heating heat pump structure and the range-extended vehicle provided by the embodiments of the present application may have at least the following beneficial effects:

[0082] 1. System charging characteristics, cooling, heating, thermal balance, defrosting and defogger, battery cooling + passenger compartment cooling, battery heating + passenger compartment heating, battery cooling, battery heating, each demand mode can improve efficiency and improve low-temperature endurance targets through this invention;

[0083] 2. By exchanging heat between the high-temperature engine coolant and the first cooler when heating is required, the heat is used to increase the energy of the air-conditioning system to heat the battery and the passenger compartment; reducing the energy consumption in the range extender mode and increasing the total mileage of the vehicle;

[0084] 3. The coolant circuit between the battery and the passenger compartment has been eliminated, thereby reducing two electronic water pumps and related expansion kettles and connecting pipes, saving overall component costs and reducing layout difficulty;

[0085] 4. The electric drive circuit and CAC intercooler circuit are integrated with two-stage cooling, which can reduce the expansion kettle and pipeline layout and reduce the overall cost.

[0086] In all the embodiments of the present application, "big" and "small" are relative, "more" and "less" are relative, and "up" and "down" are relative. The expressions of such relative terms are not elaborated in the embodiments of the present application.

[0087] It should be understood that the "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, "in this embodiment", "in the embodiment of the present application" or "as an optional implementation" appearing throughout the specification does not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. Those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required for the present application.

[0088] In the various embodiments of the present application, it should be understood that the size of the serial numbers of the above-mentioned processes does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0089] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A direct cooling and direct heating heat pump structure, characterized in that: including a refrigerant cycle component and an engine cooling cycle component; The refrigerant cycle assembly includes a compressor, an air conditioning assembly, a multi-way reversing valve, a first cooler, a second cooler, and an external condenser, wherein a plurality of ports of the multi-way reversing valve are respectively connected to the compressor, the air conditioning assembly, the first cooler, the second cooler, and the external condenser, wherein the second cooler is connected in series with the power battery heat exchange cavity; The engine cooling cycle assembly includes an engine cooling cavity, the engine cooling cavity is connected to the coolant channel of the first cooler, and the engine cooling cavity performs heat exchange with the refrigerant channel of the first cooler.

2. The direct cooling and direct heating heat pump structure according to claim 1 is characterized in that: The engine cooling circulation component also includes an on-off valve, a first water pump, and a first radiator, wherein the engine cooling cavity, the on-off valve, the coolant channel of the first cooler, and the first water pump are cyclically connected, and the engine cooling cavity, the first radiator, and the first water pump are cyclically connected.

3. The direct cooling and direct heating heat pump structure according to claim 2 is characterized in that: The engine cooling circulation component further includes a first expansion water tank, and two ends of the first expansion water tank are respectively connected to the outlet end of the engine cooling cavity and the inlet end of the first water pump.

4. The direct cooling and direct heating heat pump structure according to claim 1 is characterized in that: The direct cooling and direct heating heat pump structure also includes an intercooler cooling cycle component, which includes a secondary cooling pipeline, an electric drive radiator and an intercooler, and the secondary cooling pipeline is connected to the electric drive radiator and the intercooler respectively.

5. The direct cooling and direct heating heat pump structure according to claim 4 is characterized in that: The secondary cooling pipeline includes a second radiator, a third radiator, a proportional three-way valve and a second water pump. The second water pump, the second radiator, the proportional three-way valve and the electric drive cooling element are circularly connected. The third radiator and the intercooler are connected in series between the proportional three-way valve and the inlet end of the second water pump.

6. The direct cooling and direct heating heat pump structure according to claim 5 is characterized in that: The secondary cooling pipeline also includes a second expansion water tank, one end of the second expansion water tank is connected to the inlet end of the second water pump, and the other end of the second expansion water tank is connected between the proportional three-way valve and the electric drive heat sink.

7. The direct cooling and direct heating heat pump structure according to claim 1 is characterized in that: The refrigerant circulation component also includes an outlet three-way valve, and the outlet end of the compressor is connected to the air conditioning assembly and the multi-way reversing valve respectively through the outlet three-way valve.

8. The direct cooling and direct heating heat pump structure according to claim 7 is characterized in that: The air-conditioning assembly includes a front air-conditioning assembly and a rear air-conditioning assembly. The front air-conditioning assembly is provided with a built-in condenser and a first built-in evaporator, and the rear air-conditioning assembly is provided with an air heater and a second built-in evaporator. The built-in condenser is connected to the outlet end of the compressor through the outlet three-way valve, and the first built-in evaporator and the second built-in evaporator are connected in parallel to the multi-way reversing valve.

9. The direct cooling and direct heating heat pump structure according to claim 1 is characterized in that: The refrigerant circulation component also includes a gas-liquid separator, which is connected in series between the inlet end of the compressor and the air conditioning assembly.

10. An extended-range vehicle, characterized in that: A heat pump structure with direct cooling and direct heating comprising the structure described in any one of claims 1 to 9.

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